Certified diamonds

IGI is the most famous European certificate with top quality standards. It's based in Antwerp (Belgium)

GIA is the US certificate, probably the most well known diamond lab in the world. It is a "must" for fancy diamonds.

HRD is based in Antwerp and is the oldest diamond certificate in the world renowned for it's high standards on high carat stones

Choose your diamond

Choose from over 15,000 diamonds updated every day at the best market price. Only 18carati offers you a huge stock of diamonds that you can sort by carat, color, clarity, cut, fluorescence, etc. using our advanced search. Discover how easy it is to create your custom solitaire ring with a dedication engraved in the stem and receive it at home in a couple of days with insured express shipping.

Each certified diamond is graded to determine its relative absence of color based on the GIA color scale which ranges from D (colorless) to Z (colored diamonds). GIA assigns a color grade by comparing the stone to a master set in a highly controlled lighting and viewing environement.

By convention, past the Z degree begins the "fancy colored diamonds" zone in which a marked and vivid degree of color is not a defect but a virtue.

Diamonds with color grade up to H look perfectly white, but also I, J and K look very white once fitted.

VVs2/Vs1

Clarity

A diamond is graded a clarity grade based on the number and placement of internal features (inclusions) and surface characteristics (blemishes) that are visible under 10x magnification. The GIA Clarity Scale contains eleven clarity grades ranging from Flawless to I3.

IF

Internally Flawless: The diamond has no internal features, It's also said "Loupe clean"

Vvs1/Vvs2

Very very small inclusions: The stone has very little features very hard to see under a 10X magnifier.

Vs1/Vs2

Very small inclusions: The diamond has minimal inclusions that are very hard to spot under a 10X mignification lens.

SI1

Small Inclusions1: Some minor inclusions are easily seen with a 10X magnifier, but they don't spoil the look of the diamond which still appear as very clear.

SI2

Small Inclusions2: The diamond features some inclusions that might spoil the look and the brilliance of the stone. In some cases inclusions are black and therefore easily visible to the naked eye.

I1/I2/I3

Imperfect 1, 2 and 3 (also called Piquè in Europe): Some inclusions are normally easily visible to the naked eye. The higher the grade, the bigger the inclusions are. In I2 and I3 grade the brilliance is surely spoilt.